Hello @JAL , thank you for reaching out. The three available options to list the different types of apps registered in AAD are:
- Enterprise Applications shows non-Microsoft applications.
- Microsoft Applications shows Microsoft applications.
- All Applications shows both non-Microsoft and Microsoft applications.
Now based on your description, it looks like the app you are trying to list is a Microsoft Application and hence it is only visible under the All Applications section. That app should also be present if you select Microsoft Applications in the drop-down and hit "Apply"
Do let us know if this works and answers your query. If not, it would be great if you can share the name of the application and the type of application you are trying to list here, and based on that we can dig in further.
Hope this helps.
Do let us know if this helps and if there are any more queries around this, please do let us know so that we can help you further. Also, please do not forget to accept the response as an Answer; if the above response helped in answering your query.